Unacceptable service at Telkom Kolonnade

I went and took out a contract for the Samsung S6 Edge. I waited a week for my phone to arrive, which was okay for me. I received my phone on Wednesday, 06/05/2015 and by Friday, 08/05/2015 I noticed that my device is faulty. It's battery life isn't lasting for more than 3 Hours and there's no apps running in the background. I went to return my device on Sunday, 10/05/2015. Instead of replacing my phone according to the 7 day out-of-box warranty, they want to send it in for repairs leaving me without a phone for a month and a half (which I still have to pay R650.00 p/m for.) This is unacceptable !! The phone should have been fine when I received it ! I'm a sales consultant and my phone is my income, a month and a half without a phone will leave me out on the street !! I'm sure the consumer act protects a consumer against this kind of stuff.